DocomintUnit Converter
Convert length, weight, temperature, volume, area, and speed between metric and imperial units.
Covers the conversions that come up most when reading a recipe in the wrong measurement system, checking a product spec sheet from another country, or converting a road sign's speed limit — six categories (length, weight, temperature, volume, area, speed) rather than a single-purpose converter, so you don't need six different bookmarked tools.
Example: A European oven recipe calling for 180°C converts to 356°F in Temperature mode — useful before setting a Fahrenheit oven dial, since temperature conversion doesn't scale linearly like the other categories (0°C isn't 0°F).
How it works
- Pick a measurement category — length, weight, temperature, volume, area, or speed
- Choose the units to convert from and to, and enter a value
- The converted value appears instantly, calculated on your device
Frequently asked questions
How accurate are the conversion factors?
They use the standard internationally defined conversion constants (e.g. exactly 1609.344 meters per mile, 0.45359237 kg per pound) — the same figures NIST and other standards bodies publish, not rounded approximations.
Why is temperature conversion different from the other categories?
Length, weight, and the other categories are pure multiplicative scales — double the value in one unit and you double it in the other. Temperature scales have different zero points (0°C isn't 0°F), so converting needs an offset, not just a multiplication factor.
Is my numbers uploaded anywhere?
No — Unit Converter runs entirely in your browser using JavaScript/WebAssembly. Your numbers is never sent to a server.